Trends in the chemistry of mono- to multimetal π-arene complexes of chromium and manganese

Synthesis and properties of Fischer carbene complexes of N,N-dimethylaniline and anisole π-coordinated to chromium tricarbonyl

“…[7][8][9] Only few examples of σ,π-bimetallic complexes where the σ-metal substituent is a Fischer transition metal carbene complex have been documented in literature. [10][11][12] This is presumably so because both the Fischer carbene moiety (CO)5M{C(OR)R'} and the Cr(CO)3 entity represent electron-withdrawing fragments that compete for π-electron density from a σ,π-bridging benzene linker. [13][14][15][16] The aims of the present study are (i) to find effective methods of synthesis for the different isomers of σ,π-bimetallic complexes of N,N-dimethylaniline and anisole π-coordinated to Cr(CO)3 with attached (CO)5W{C(OEt)}-substituents and (ii) to study and further our understanding of the electronic and structural features of this rare class of σ,π-bimetallic carbene complexes.…”